Someone who eats all your food, and disapears when you run out (they've gone to mooch off food off somebody else until you refill your cabinets). Sometimes they will tell you that it's time to restock the food-supply (because they ate all the food and would like to do it again). They will often leave empty food containers in the refrigerator, to pretend like there is food left, when there is none.

Man, she's a food-mooch. She emptied my cabinets and left me with nothing except dog food. I went thru the refridgerator and there was nothing left except 6 empty containers, and some mustard.